|Table of Contents|

Study on effect of pitting corrosion on behavior of concrete-filled steel tube under lateral impact(PDF)

《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]

Issue:
2025年04期
Page:
31-42
Research Field:
建筑结构
Publishing date:

Info

Title:
Study on effect of pitting corrosion on behavior of concrete-filled steel tube under lateral impact
Author(s):
HUANG Xuankai1;  LIAO Feiyu2;  WANG Xianzhi1;  CHEN Yufeng2
(1. College of Transportation and Civil Engineering, Fujian Agriculture and Forestry University, Fuzhou 350108, Fujian, China; 2. Fujian Construction Engineering Group Co., Ltd., Fuzhou 350003, Fujian, China)
Keywords:
concrete-filled steel tube;  pitting corrosion;  lateral impact;  finite element model;  parametric analysis
PACS:
TU398
DOI:
10.19815/j.jace.2023.12006
Abstract:
In order to study the effect of pitting corrosion on the mechanical behavior of concrete-filled steel tube(CFST)under lateral impact loads, a finite element model of circular CFST considering pitting corrosion was established. The tests of four circular CFST specimens considering pitting corrosion defects subjected to lateral impact using a falling hammer were carried out, and the reliability of finite element model was verified using experimental data. The working mechanism of CFST columns with pitting corrosion under lateral impact loads was studied using finite element models. The influence of factors such as pit depth, number of pits, pit distribution, corrosion volume loss, and impact velocity on the lateral impact resistance of CFST columns was investigated. The results show that pitting corrosion not only makes steel pipes more prone to local buckling, but also weakens the interaction between steel pipe and concrete, resulting in a decrease in the impact resistance of components. With the increase of pit depth, number of pits, and corrosion volume loss, the impact duration of component will correspondingly increase, while the peak and plateau values of impact force will decrease accordingly. Under the same corrosion volume loss, the number of pits has a more significant impact on the lateral impact resistance of CFST columns than the pit depth. The non-uniform distribution of pits has more adverse effect on the lateral impact resistance of CFST compared to the uniform distribution.

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Last Update: 2025-07-10